<div class="modal fade" id="compose-modal" tabindex="-1" role="dialog" aria-hidden="true">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
                <h4 class="modal-title"><i class="fa fa-envelope-o"></i> Título del Dialog</h4>
            </div>
            <form action="#" method="post">
                <div class="modal-body">
                    
                </div>
                <div class="modal-footer clearfix">
                    <button type="submit" class="btn btn-primary"><i class="fa fa-envelope"></i> Enviar</button>
                    <button type="button" class="btn btn-danger pull-left" data-dismiss="modal"><i class="fa fa-times"></i> Cancelar</button>
                </div>
            </form>
        </div><!-- /.modal-content -->
    </div><!-- /.modal-dialog -->
</div><!-- /.modal -->